The Powell lens resembles a round prism with a curved roof line. The lens is a laser line generator, stretching a narrow laser beam into a uniformly illuminated straight line.
The Powell lens is a quantum leap forward in line generator performance over the simple cylinder lens. A cylinder lens produces a poorly illuminated line, one limited by the non-uniform, Gaussian laser beam. The Powell lens' rounded roof is in fact a complex two-dimensional aspheric curve that generates a tremendous amount of spherical aberration that redistributes the light along the line; decreasing the light in the central area while increasing the light level at the line's ends. The result is a very uniformly illuminated line used in all manner of machine vision applications; from bio-medical and automobile assembly to chocolate chip cookie production.
Powell prisms (also called laser linear generator lenses) are optical marking prisms that can be optimized for the input of laser beams with a diameter of 0.8mm. After passing the laser beam, it can be optimized into a straight line, with uniform optical density, good stability and good linearity. Unlike the cylindrical lens that generates the central hot spot and the fading edge of the Gaussian beam, it can eliminate the distribution of the central hot spot and the fading edge of the Gaussian beam, and form a straight line with uniform energy distribution. The full fan angle ranges from 1° to 120°. The standard specifications are 5°, 10°, 20°, 30°, 40°, 45°, 50°, 60°, 70°, 80°, 90°, 110° and 120°.
The Gaussian laser beam passes through an ordinary cylindrical lens to produce a linear uneven distribution, while Powell has a complex two-dimensional aspheric surface on the top of the prism. A large amount of spherical aberration is generated through the laser, and the optical path is redistributed, reducing the center of the light. Area, increase the edge of the light, form a uniform line, suitable for various biomedical, automobile assembly, food processing and machine vision applications.
Used for positioning, laser marking machine, processing marking positioning, building target marking, laser scanning system, measuring equipment. It is suitable for various machine vision applications; from biomedicine to car assembly to chocolate chip cookie production; various online inspections of mobile phones, aircraft military applications, and shipyards.
|Material||Fused silica/ BK7glass|
|Diameter||Φ0.8mm, Φ1mm, Φ2mm, Φ3mm, Φ5mm, Φ6mm, Φ9mm, Φ10mm, Φ 15mm or customized size|
|Diameter Tolerance||+0.0/-0.05mm / ±0.05mm|
|Range of Fan||3°,5°,10°,15°,20°,30°,45°,53°,60°,70°,75°,85°,90°96°,100°,110°,120°|
|Angle tolerance||<3arc min~30arc sec.|
|Beam wide||3mm, 4mm, 5mm or customized size|
|Surface quality||60/40, 40/20, 20/10 scratch and dig|
Precision of specification we can achieve
|material||BK7 or other material|
|center thickness tolerance||0.005mm|
|surface quality||80-50 to 10-5|
|suface flatnedd||<lambda to lambda/20|
>> Company Introduction
>> Related Products
VY Optics could also manufacture and design other optical elements, including achromatic lens, dome lens, filter, prism, ball lens, cylindrical lens, optical mirrors, spherical lens and rod lens, we can fabricate high-precision lens as per your requested.
Q: Do you provide samples? Is it free or charged?
· We'd like to supply samples for free if we have it in stock, but we don't pay freight.
Q: How long is your delivery time?
· Regarding inventory, it is 3 working days;
· For customized one, it's about 15-25 working days, depended on exact quantity and order date.
Q: Is it possible to customize special lens?
· Yes, to customize special optical element and coating are available here.
Q: How to pay?
· T/T, Alibaba online assurance payment, MoneyGram, West Union, Paypal and so on.
Q: How to ensure the safety of payment?
· VY Optics is a reliable supplier not only audited on Alibaba, but also on Made-in-China, reputation and quality is life of our company, and we support Alibaba Trade Assurance.
Q: How do you ship goods?
· Low value sample: EUB, E Express of China Post, which is cheap;
· Light weight parcel: DHL, FedEx, TNT, UPS, EMS, SF Express, China Post;
· Heavy cargo: by air or by sea, ship on pallet.
Our company enjoy a considerable discount owing to long-term cooperation with courier company.